Base64 encode and decode

Encode or decode Base64 text with UTF-8 support.

Works with emoji and non-English text, and accepts URL-safe Base64 (with - and _).

How to use it

  1. Choose Encode or Decode.
  2. Paste your text.
  3. Copy the result.

Questions

Are my files uploaded to a server?

No. The tool runs entirely in your browser using JavaScript, so your files never leave your device. You can even disconnect from the internet after the page loads and it keeps working.

Guides

All guides
Developer tools · 23 Oct 2026How to Check the SHA-256 Hash of a File (Windows, Mac, Linux)Check a file's SHA-256 hash with certutil or PowerShell on Windows, shasum on Mac, sha256sum on Linux, or in your browser. Verify downloads properly.Developer tools · 23 Oct 2026How to Convert an Image to a Base64 String (and Back)Convert any image to a Base64 string or data URI for HTML, CSS and JavaScript, decode Base64 back to an image, and know when the size overhead is worth it.Developer tools · 23 Oct 2026How to Decode a Base64 Encoded String (Linux, JS, Python)How to decode a Base64 encoded string online or with Linux, PowerShell, JavaScript atob/btoa and Python, and why Base64 is not encryption.

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